Automobile transmission



. M. F. JUDD AUTOMOBILE TRANSMISSION Flled July 12 1926 Nov-.1 1926.

' Patented Nov. 1%, 1926.

MORTON F. J'UZDD, OF STRATFOBD, CONNECTIC'UIiASSIGNOR TO THE HAYBESTOS GOM- IPANY, or BRIDGEPORT, CONNECTICUT, aoonronarion or CONNECTICUT.

AUTOMOBILE rnansivussron.

Application filed July 12,

This invention relates to transmission devices for automobiles, and especially to the Ford type of transmissions.

It is well known that the Ford type of transmission comprisesthree rotating drums, one for the low speed, the reverse and brake respectively, located closely ad-' iacent each other and enclosed in a casing including a cover comprising substantially the entire upper half of the casing, and which cover has a small opening in the top thereof over these drums which is closed by a' hand plate. Each drum is substantially encircled by a flexible steel band lined with V asbestos or other suitable material, and is provided at its ends with forked or apertured ears engaged by an operating rod connected to the familiar operating pedal for clamping the band about its drum. It is obvious that after the mechanism has been in'use for sometime the asbestos or other lining for the bands wear out and must be renewed, Owing to the peculiar construction of the transm ssion and trans- V v mission cover, in order to replace any or the linings it is necessary to remove andre- I place." the entire transmission] cover, an operation which requires considerable skill and time. i i i In order to overcome these objections I have devised a new construction for these. bands and the operating mechanism therefor which will permit their easy removal and insertion through the hand opening in 3 thetop ofthetransmission casing. I

In the usual Ford type of transmission the operating'mechanism for the band comprises an element adjustably mounted in one side of the casing and forming an abutment at its inner end for one of theears of the band, a rOtatable and slida-ble element extends through the other side of the casing and-the other ear of the band and pro i jects at its free end' into a socket in the-inner end of the adjustable member, and a coiled spring embraces "the second element and is: supported thereby between thefree ears of thefband, whichspring engages the ears at theopposite ends thereof and tends to separate them to unclamp the band from the drum, Inmy improved construction I have done away with thesecond element extending between the ears of theband to support the spring, and thus leave this space free for removal of the band, except that 1926. Serial No, 121,?7'7.

ployed throughout the various figures to indicate corresponding elements,

Fig. 1 is a top plan view of a portion of a casing for a transmission of "the type mentioned with "the hand hole cover removed and portions being broken away to more clearly show the construction. In'this figure, however, "only one of the rotary drums and the bandtheretor is shown, the

other two being omitted for greater clearness of lllustration.

Fig. 2 is a side elevation of the upper portion of a drum, the band and the operating mechanism therefor, and

Fig. 3 isa side elevation ot-my improved spring construction.

Inthis type of transmission, as is well known, there are three drums placed side by side, the forward drum: being the reverse drum, the central drum thelow speed drum, and the rear drum the brake drum.

I have, however, merely shown the central or low speed drumIlO and have omitted; the other drums as the same construction of band and operating means theretor nay be used for all three drums. The transmission band comprises astrip of flexible steel 11 having forkedor apertured ears 12 sec ured to the opposite endsthereotto receive the operating mechanism for clamping the band about the drum. Inthe present instance, there is a member 18 adjustably mounted in the casingll: by suitable screw threads,

and it is normally stationary and engages the right hand ear 12b t the band; at its inner end to form a normally stationary,

abutment for this ear. The member, 13 may, of course, be adjusted in or out in the casing to adjust the position of the band by'rotation-thereof through a suitable tool engag ing the outer non-circulahend 15 and after adjustment may be locked'in adjusted position by 'the lock nut 16. At its inner end this member'is provided with a socket 17 member 13.

opening from this end for a purpose presently to be described.

On the other side of the casing isa rod 18 rotatably mounted in the bearing 19 in the casin and it is connected at its outer end to'fan operating pedal 20 for rotating this rod. Inside the casing is a stationary element 21 having a cam surface 22 cooperating with a correspondingly shaped cam surface on a collar 23 secured to the rod 18 by any-suitable means, as a tapered pin 24. The rod 118 extends through the left hand car 12 of the band and projects a short dis tance 'onthe inner side thereof, as shown at 25. I It will be apparent from an inspection otthe drawing that this leaves a free space between the ears of the band so that the band may be easily withdrawn through this space,- and to facilitate this easy removalor insertion of the band either one or both of the cars 12 may bedetachably secured to the band by any suitable means, such as that disclosed in the patent to Ross a -1,543,523, dated June 23, 1925. 'lhissecuring means comprises studs 29 enthe band extending through openings in the body of the car 12, and a rotatable button 30 mounted thev band 'inposition to pass through an elongated opening 31 in the bodyof the ear and adapted to be turned to a position to overhang this body and lock the ear to the band.

Inserted between the ears 12 of the band is aspring of peculiar coiist'ruction. As in- (heated in Fig. 3, this spring is a helical spring having a body portion 2801 a given diameter larger than the apertures through the ears 12, so that when the spring is inserted between these cars the op 'aositeends of this body portion will engage the inner sides of the ears and tend to separate them. At one end the spring is reduced in diameter, as shown at 27, so that it may pa ss througlrthe aperture inthe right hand ear 12' and into the socket '17 in the adjustable This reduced portion of the spring holds the right hand ea'r12 of the band in proper position against the inner end of the member 13. At its other end the spring embraces the projecting end2'5 of the operating rod 18 which acts to hold the left hand ear 12 in the proper position;

In operation, forcing the upper portion of the pedal 20 forwardly with the foot will turn the rod 18 in its bearing and with it the collar 28 carrying the cam surface. Cooperation of this camsurface'with that on the stationary element 21 will force the rod inwardly or to the right, as viewed in Figs-'1 and 2, and with it the left hand ear 12. The right hand ear 12 will be held stationary by the member 13, and therefore, the band will be clamped about the drum,.the force of the clamping action idependin'g, of course, 'on the ainount of turn ing movement imparted to the rod 18. This action will compress the body portion 26 of the spring, and when the force on the pedal is removed the springwill separate the ears of the band to nnclamp it from the ClI'UIIl'. In removing the band the member 18 is moved outwardly in its mounting in the easing and then the spring 26 may be removed. The band is now free and the removable ear l2 may be detached therefrom and the band easily withdrawn from its position around the drum in the casing by merely withdrawing the other ear upwardly through the opening 28 in the casing. Of course, the insertionrof the new band merely involves the reversal of this operation. I I 7 Having thus set forth the natureof my invention, what I claim is: I r V I 1. In a transmission, a transmission band provided with apertured ears at its ends, an abutment engagingone of the ears and provided with a socket at its inner end, a bar extending through the other ear having an abutment to engagethe same and mounted for rotary and sliding movements and a coiled spring between the ears tending to separate the same, said spring being supported by the bar atone end and having a reduced portion at the otherend extending throi'igh the ear and into said socket;

In a transmission, a transmission band provided with apertured ears at its ends, actuating means for said'band c' omprising members engaging the outer sides of the ears, one of said members having a jsocljrt at its inner end and the other an extension projectii'rg through the "aperture in -one of the ears, and a coiled spring between the ears embracing said extension atone end and having a reduced portion at, its other end extending through the other ear and into said socket. II I h I r 3. An automobile transmission comprising a drain, a split band embracin'gjthe drum, apertured ears upon the'ends'of the band, means for actuatingthe band to and from clutching: engagement with the drum including a pair of members engaging the outer 'side'sof the ears,one of said nienibers having a socket leading fromits inner end and the other member having an extension projecting through one of the ears, ands coiled spring between the ears tending to separate them, said spring embracing said extension atone end and provided with a reduced portion at its other endextending through the other ear into said socket. I

1. In an automobile transmission device,

'a casing, a rotary drum in said casing, 21 flexible transmisslon band embracing said drumand provided with'e'ars'at its opposite ends, av member adjustably mounted in the casing formingan abutinent'for oneof's'aid ears and having a socket leading from its and having a socket in its inner end, a bar,

inner end, a spring between said ears tend ing to separate them and having a reduced portion at one end extending into said socket, a support for the other end of the spring mounted to slide in the'casing and forming an abutment for the other ear, and means for sliding said support.

5. In an automobile transmission device, a casing, a rotary drum in said casing, a flexible transmission band embracing said drum and having ears at its opposite ends, a member adjustably mounted on the casing forming an abutment for one of said ears extending through the other ear and mounted for-rotary and sliding movements in the casing, an abutment carried by said bar for the latter ear, a coiled spring between the ears tending to separate them, said spring embracing said bar at one end and provided with a reduced portionat its opposite end extending into said socket, means for giving a sliding movement to the bar upon rotation thereof, and means for turning said bar.

7 form an abutment, said spring being located between the ears and tending to separate the same, and supporting members engag-.

ing the outer sides of theears and forming supports for said spring.

'7. In a transmission, a transmission band provided with ears, and actuating means for said band including a helical spring reduced in diameter at one end to extend into one.

of said ears and form an abutment to engage the inner side of said ear, said springbeing located between the ears and tending to separate them, and supporting members proriding abutments for the outer sides of the ears and forming supports for said spring.

In testimony whereof I aflix my signature.

MORTON F. JU DD. 

